11 00 039 Checking compression of all cylinders (N12, N14)

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: High tension - mortal danger!
Interrupt power supply to ignition coils.

Necessary preliminary tasks

Unscrew tip (1) from special tool 11 0 222.

IMPORTANT: Then check the Schrader valve that is now visible for secure seating.

Fig 1: Identifying Spark Plug Tip With Special Tool (11 0 222)

Courtesy of BMW OF NORTH AMERICA, INC.

Prepare special tool 11 0 222 in conjunction with 11 8 732 and 11 8 731.

Fig 2: Identifying Special Tools (11 0 222), (11 8 732) And (11 8 731)

Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 11 0 222 onto special tool 11 8 731 to 10 Nm.

Fig 3: Identifying Special Tools (11 0 222) And (11 8 731)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not forget to oil spark plug thread of special tool 11 8 731.

Screw special tool 11 0 222 by hand into spark plug thread and connect special tool 11 0 224.

Use adapter lead (1) if the compression pressure is being checked with the BMW diagnosis system.

Depress accelerator pedal and actuate starter until compression pressure stops rising.

Fig 4: Identifying Special Tools (11 0 222) And (11 0 224)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine

Now clear the fault memory.